Junk Yard · Troubleshooting the Junk Yard
Why did a scrap disappear from my Junk Yard?
Short answer: Its timer ran out, the board hit its cap and dropped the oldest scrap, it was deleted (including by a two-finger tap in the curtain), or the board was cleared. Check filters too.
Usually one of four things: its auto-clear timer ran out; the board reached its Keep up to cap and the oldest scrap dropped off; it was deleted (a two-finger tap in the curtain deletes a tile when that gesture is on); or Clear all Junk was used.
None of these can be undone. To keep a scrap longer, give it a longer lifetime, raise the cap, or turn off two-finger-tap delete. Also check that no search or filter is hiding it.